Novak Djokovic is through to the quarterfinals of the French Open.
But can the star play against Norwegian Casper Ruud?
The Serbian star says he has had problems with his left knee for a couple of weeks.
And it didn't get any better when Djokovic twisted his knee during the round of 16 match against Argentine Francisco Cerundolo.
Early in the second set, he received treatment, the doctor visited him a few more times, and before the fourth set, the 37-year-old received medication to be able to continue playing.
Djokovic won the fourth set, tied the score to 2-2 in sets and secured the quarterfinal with 6-1, 5-7, 3-6, 7-5, 6-3.
A win that was also historic, as he is now alone with 370 victories in Grand Slam contexts.
But the question is whether he will play against Norwegian Casper Ruud, who won 3-1 against American Taylor Fritz.
During the match in Paris, Novak Djokovic was clear that he thought the court was too slow. When he fell in the fifth set, he lost his temper and loudly criticized the surface.
